JP3125333B2 - Seat device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat device having an enhanced reclining mechanism.

[0002]

2. Description of the Related Art It has become common to equip a seat device with a reclining mechanism for tilting a seat back in order to create a comfortable seating comfort. This reclining mechanism meshes an upper gear on the seat back frame side with a lower gear on the seat cushion frame side (the number of teeth of at least one of the two gears is smaller than that of the other gear) so that the two gears are aligned with the center. The eccentric shaft part has a configuration to support it.

In this reclining mechanism, a seat back can be tilted with respect to a seat cushion by rotating a shaft. On the other hand, for the safety of the occupants, it is mandatory to wear a seat belt.

[0004] As shown in FIG.
The seat device 25 having the seat 4 integrated in the seat is provided with a retractor 27 attached to a seat back frame 26. In the case of a vehicle collision, a very high rotational moment acts on the reclining mechanism on the side member side of the seat back frame 26 to which the retractor 27 is attached due to the belt load input to the shoulder belt anchor point in the event of a vehicle collision.

For this reason, a high load acts on the meshing portion between the upper gear and the lower gear, causing problems such as deformation and damage of the teeth and deformation of the release arm due to a high load on the release arm.

[0006]

In order to solve the above-mentioned problems, the thickness of the gear and the release arm must be increased, and the thickness of related parts must be similarly increased.
Such a solution only increases the weight of the seating device and is not a preferred measure.

Therefore, an object of the present invention is to solve the above-mentioned disadvantages of the prior art.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention basically has an upper gear and a lower gear located between a pair of lower arms, and a shaft supporting both gears and a pin of a release lever. Is received by the pair of lower arms.

More specifically, the present invention provides an upper gear fixed to a side member of a seat back frame provided with a retractor, a lower gear meshing with the upper gear, a pair of lower arms surrounding both gears, and a center thereof. A shaft having a shaft portion pivotally supported by the pair of lower arms and an eccentric shaft portion pivotally supported by the upper gear; and a first pin supported by the center axis portion of the shaft and fixed to the tip thereof. A release arm inserted into the first long hole of the first arm, a cam hole of the release arm and a second arm of the pair of lower arms.
A second pin which passes through a long hole of the lower gear and which can be inserted into and removed from a notch of the lower gear, and which is capable of engaging and disengaging the lower gear with respect to the lower arm, and a lower pin which receives a third pin fixed to the upper gear. A seat device having a third slot.

[0010]

According to the present invention, since the pin of the release arm connecting the lower gear to the lower arm is received by the pair of lower arms, the rotational moment at the time of a collision accident can be sufficiently supported, and high strength can be secured.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. Preferably, a pair of upper gears 1, 2 fixed to the retractor side members of the seat back frame are meshed with a pair of lower gears 6, 7, preferably. The outer teeth of the upper gears 1 and 2 have one more tooth than the inner teeth of the lower gears 6 and 7.

The two gears 1, 2, 6, 7 are supported at both ends by a shaft 13 supported by a pair of lower arms 3, 4. The pair of lower gears 6 and 7 are connected via a bush 9 to the shaft 1.
3 and the pair of upper gears 1 and 2 are supported by the eccentric shaft of the shaft 13 via the bush 10. The pulley 15 is connected to the shaft 1 using the pair of E-rings 11 and 12.
3 to allow the shaft 13 to rotate.

As shown in FIG. 4, the lower gears 6, 7 have a notch 28 at the lower end. A pair of release arms 17 are supported on the shaft 13, and a second pin 16
Together with the roller 21. The release arm 17 has a cam hole 29, into which the second pin 16 is inserted. The lower arms 3 and 4 are provided with a second elongated hole 30 having a center line passing through the center of the shaft 13, and the second pin 16 is also passed through the second elongated hole 30.

In the example shown in FIG. 1, the second pin 16 passes through the notch 28 of the lower gears 6, 7, the second elongated hole 30 and the cam hole 29. When the release arm 17 is rotated, the second pin 16 is guided by the cam hole 29 and moves downward along the second long hole 30, so that the second pin 16 is disengaged from the notch 28, and the lower gears 6, 7 When the lower gears 3 and 4 are connected to each other, the gears 1, 2, 6, and 7 can be largely tilted in the front-rear direction without rotating them.

The first pin 2 at the tip of the release arm 17
2 is inserted into the first elongated holes 31 of the pair of lower arms 3 and 4 to stabilize the path of the release arm 17.

The third pair of the upper gears 1 and 2 which couple the pair of the upper gears 1 and 2
Is passed through the third elongated holes 32 of the lower arms 3 and 4.
The pair of pins 8 are integrated by the plate 5. The first and third elongated holes 31 and 32 have an arc shape centered on the axis of the shaft 13.

Bracket 23 supported on shaft 13
Is connected to the release arm 17 via a screw 18 and a notch so that the pair of release arms 17 can be interlocked. 14 and 19 indicate washers, and 20 indicates E-ring.

The second pin 16 is disengaged from the notch 28 of the lower gears 6, 7, and the lower gears 6, 7 and the lower arms 3, 4
As described above, the connection between the second elongated hole 30 and the notch 28 is made concentric, and the release arm 17 is operated by operating the release arm 17 as shown in FIG. The second pin 16 is inserted into the notch 28, and the lower gears 6, 7 are connected to the pair of lower arms 3, 4 via the second pin 16.

At the time of a collision, a high load acts on the reclining mechanism on the shoulder anchor point side.
Since the high load is applied to the lower arms 3 and 4 by the shearing force at both ends of the sheet 6, the seat device has a high strength.

[0020]

According to the present invention, since a load acting on the pin is received by the lower arm, a high load at the time of collision does not act on the release arm.
The operation of the release arm is always light, and the release arm can be made lightweight.

[Brief description of the drawings]

FIG. 1 is a partial front view of a reclining mechanism according to an example of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a perspective view of an example of a sheet device of the present invention.

FIG. 4 is a plan view of a lower gear.

[Explanation of symbols]

 1, 2 Upper gear 3, 4 Lower arm 6, 7 Lower gear 8, 16, 22 Pin 13 Shaft 15 Pulley 17 Release arm

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60N 2/20 B60R 22/26

Claims (4)

(57) [Claims] An upper gear fixed to a side member of a seat back frame provided with a retractor; a lower gear meshing with the upper gear; a pair of lower arms surrounding the two gears; A shaft supported by the upper gear and an eccentric shaft portion supported by the upper gear; and a first pin supported by the center shaft portion of the shaft and fixed to the end thereof is connected to a first elongated hole of the lower arm. The lower gear is inserted into the lower arm so that the lower arm can be freely inserted into and out of the notch of the lower gear through the inserted release arm, the cam hole of the release arm and the second elongated hole of the lower arm of the pair .
Seat assembly having a second pin to disengageably, and a third oblong holes provided in the lower arm receiving the third pin fixed to the upper gear relative Aamu. 2. The seat device according to claim 1, wherein the upper gear and the lower gear are formed of two sheets facing each other, and are disposed between the pair of lower arms. 3. The radial shape having the first and third elongated holes having an arc centered on the center of the center axis portion of the shaft, and the second elongated hole having a center passing through the axis. The sheet device according to claim 1, wherein the holes are holes. 4. The seat device according to claim 2, wherein the third pins are pairs and are connected by a plate.